feat(extensions): update pg_textsearch to 1.3.1

[f0rr0]

Summary

• update the pinned pg_textsearch source from 0.6.1 to 1.3.1 and refresh control, legal, catalog, mobile, WASIX, and release-semantic metadata
• add a real Linux x64 upgrade qualification that builds 0.6.1, preserves and queries a BM25 index through the 1.3.1 library swap, runs ALTER EXTENSION UPDATE, then verifies writes, merge, dump, and restore
• adapt the Windows producer to the 1.3.1 source layout with exact structure-layout guards and Makefile-derived source/SQL inputs
• replace global exact-extension ownership of the Kotlin catalog with generated product-local metadata slices

Why

The previous Windows integration duplicated pg_textsearch's upstream Makefile and was coupled to older header locations. It could silently drift as upstream changed. Exact-extension release fingerprints also depended on one global generated catalog, causing unrelated extensions to churn together.

The upgrade also needs lifecycle proof because both 0.6.1 and 1.3.1 require shared_preload_libraries = 'pg_textsearch', and existing indexes must remain usable across the binary and SQL upgrade.

Impact

Oliphaunt extension artifacts now carry pg_textsearch 1.3.1. Existing 0.6.1 installations have a tested upgrade path, while release ownership remains product-local and unrelated extension releases stay independent.

Validation

• real PostgreSQL 18/Linux x64 upgrade: pg_textsearch 0.6.1 (07936f7c) → 1.3.1 (578ff529)
• extension model, source-pin, asset-fingerprint, and release-semantic checks
• 23 focused pg_textsearch/ownership tests
• canonical release gate: 1,592 passed, 15 host-specific skips, 0 failures

Windows producer contracts pass locally; the hosted Windows exact-candidate build remains the platform compilation proof.